August 24, 20205 yr Hello Members, Let me give you'll a run through of my system setup pardon me if i sound novice. i have a main panel and a critical load panel. My CT sensors from the deye 8kw inverter is connected to the Main AC line coming into my home ( I did this so i during the day i can choose the option of ZERO TO CT and feed my non critical load too). Yesterday we had a couple seconds power outage in the area and i had a black out and the inverter gave an error code of F18 which states AC OVERCURRENT . i manually changed over to Grid via the changeover switch. After a couple minutes the error beeping went off i switched back to dc power. Any reason why this could have happened. What should i do to avoid this error in the future.
August 25, 20205 yr If the Deye is the same as the Sunsync, it has a rated current on the essential load side of 21.7A, with a max of 25A and a pass through Amperage of 35A. When the utility came back on again, maybe with your load restarting, it pulled more than the max current allowed.
August 25, 20205 yr If you have a lot of inductive loads on the non-critical load side coming on at the same time it might have drawn too much current at one time. These would be items with motors like water pumps and fridges.
September 18, 20205 yr Good day i have a 5kw deye inverter and the inverter give me error 10 aux powerboard failure can anyone tell my what can be the cause
April 30, 20215 yr This was a long time ago, but just in the event anyone needs help again. You can send an email to [email protected] include your inverter serial number and the problem and they will help you.
January 31, 20224 yr Hi, hope some people reading this old topic Can you help me out a little? I got F18 code (AC overcurrent) it is known that that this can be caused by high surge currents. Got a few questions (model 10kW): 1. Is the 'surge' a problem if the hybrid inverter is connected on grid too and the current can flow from AC in to Load port? the passthrough current is 45 Amps right? 2. After resetting the inverter, the F18 code does not go away, does this indicate that some relay is broken? Any tips on how to continue? Twan
January 31, 20224 yr I had F18 error caused by a faulty changeover switch. The inverter would take the load perfectly but tripped on F18 when the mains came back on. Whether ot not the changeover switch was faulty, I dont know but this is what I was told. Could have been a wiring error as well, as this was changed and changed again. Edited February 1, 20224 yr by Scubadude
January 31, 20224 yr what do you mean with changeover switch? Did the error go away when your cabling was changed?
February 1, 20224 yr Mains/inverter changeover. An electrician (not the cable guy) came and sorted out the wiring. My DB was rewired half a dozen times and the installer, cable guy and electrician learned by doing what the difference is between essential, non essential and aux loads, and how to properly install the CT coil. After one of these the issue disappeared.
October 25, 20223 yr Hi Guys Recently if started getting this error: F18HW_Ac_OverCurr_Fault when Eskom load shedding ends. Not every time, but a few times over the last 3 weeks. Happened at 4.30 this morning, no large loads and system has been installed since January this year. Any idea what could be causing it or what needs to be checked? Thanks
November 3, 20223 yr On 2022/10/25 at 1:09 PM, P1000 said: It might be your inverter: Yeah, unfortunately. The inverter I was struggling with on this issue is in for repairs with Sunsynk now so we'll see what they say... Weirdly mine was the other way around though - only ever through the F18 error when load shedding started.
January 27, 20233 yr On 2022/10/25 at 12:58 PM, Sethm said: Hi Guys Recently if started getting this error: F18HW_Ac_OverCurr_Fault when Eskom load shedding ends. Not every time, but a few times over the last 3 weeks. Happened at 4.30 this morning, no large loads and system has been installed since January this year. Any idea what could be causing it or what needs to be checked? Thanks I have just started getting the same issue on my Sunsynk 5.5kw Inverter - sometimes, as loadshedding ends, the what did you do to solve the issue? I
February 14, 20233 yr How was the issue of error F18 resolved, experiencing the same challenge when Electricity comes back.
May 22, 20233 yr Hi recently installed a Deye 8kw inverter gas an issue where the inverter started beeping , burning smell switched it off and looked at the app which showed the F18 error code
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